Flour-bolting sieve.



No. 699,745. Patented may l3, I902.

n. I. coeam.

FLOUR BOLTING SIEVE.

[Applinatinn filed Apr 30, 1901.) (No Model.)

IJTTE STATES PATENT OFFICE.

DANIEL IRA COGGIN, OF WAVERLY, NEBRASKA.-

FLOUR-BOLTING SIEVE'.

SPECIFICATION forming part of Letters Patent No. 699,745, dated May 13, 1902. Application filed April 30,1901. Serial No. 58,209. (No model.)

To (LZZ whom 'zl'rl may concern.-

Be it known that I, DANIEL IRA COGGIN, a citizen of the United States, residing at Waverly, in the county of Lancaster and State of Nebraska, have invented a new and useful Improvement in Flour-Bolting Sieves, of which the following is a specification.

This invention relates to sieves for fiour bolting or sifting machines, and more particularly to that class known commercially as plansifters.

The object of the invention is to provide for detachably interlocking a pluralityof superposed sieves against edgewise displacement during the gyratory movement to which they are subjected when mounted in the bolt ing or sifting machine.

Another object is to effect the interlocking of the sieves in a simple and convenient manner Without changing the usual construction and arrangement of the frames.

With these objects in View the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims, it being under stood that changes in the form, proportion, size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, forming a part of this specification, and in which like numerals of reference indicate corresponding parts, I have illustrated one form of embodiment of my invention capable of carrying my procedure into effect, it being understood that other forms of embodiment thereof may be employed without departing from the spirit of the invention, and in these drawings- Figure 1 is a view in perspective of the bolt-- ing-sieve. Fig. 2 is a similar view of the collecting box. Fig. 3 is a longitudinal sectional view exhibiting the bolting-sieve and the collecting-box assembled.

In describing this invention. the peculiar construction and arrangement of one form of bolting-sieve will first be given and then the construction of one form of collecting-box.

Referring to thedrawings, 1 designates the bolting-sieve, the same being a rectangular structure constructed of any suitable mate rial, preferably of wood, and having an open bottom and a longitudinally-arranged partition 2, constituting a conveying and directing board, this latter being shorter than the length of the frame to permit passage of the flour contained on one side of the board to the other and thence out through the escapeopening, as usual. The board carries a plurality of agitating and propelling flights or arms 3, the same being arranged, as is shown in Fig. 1', in break-joint order on opposite sides of the board. The arms 3 may be constructed in any preferred manner, preferably by bending up sheets of metal to the desired shape and securing these upon the sides of the board, the under faces of the arms being raised some distance above the sieve 4, thereby to obviate any danger of packing of flour between these arms. At the end of the board are arranged two arms 5, which flare outward at any desired angle, these arms serving to force or feed the flour from the intake side of the sieve around the board to the outtake side.

The sieve-cloth 4 is secured to the under side of the frame in the usual manner, as by tacks, and is held against sagging by transverse cleats or bars 6. Of these there are shown in this instance but two; but it is to be understood that I do not limit myself to this number, as two or more may be employed and still be within the scope of my invention. At

side thereof is arranged a longitudinally-disposed cleat 7, this being secured to the board 2 andto one end of the frame. The object of these cleats is to support the sieve-cloth against sagging and to engage with suitable recesses formed in the upper edges of the collecting-box 8, which will now be described.

The frame of the collecting-box is substantially the same as that of the bolting-sieve and has its bottom 9 formed of any suitable material, preferably of muslin or other textile fabric, varnished or otherwise treatedto render it proof against escape of flour, the cleats 10 and 15 for preventing the bottom from sagging being, as in the bolting-sieve, secured to the under sideof the frame, so that there will be an unobstructed surface for the passage of flour from end to end of the collectingone end of the sieve-frame and on the under box.. If preferred, the agitating and propelling arms may be arranged inthe same manner as that shown in connection with the bolting-sieve; but I may, as shown in Fig. 2, secure one set of these arms to the partition and the other set to one of the sides. The preferred arrangement of the propelling-flights is as shown in the drawings, wherein the sieve has the flights arranged upon opposite sides of the intermediate partition 2, whereby the material may be fed from one compartment.

to the other, so that tailings may be finally discharged through the opening 13,and thereby traverse the maximum area of the screen or sieve. In the collecting-box itis designed to discharge the material as soon as possible, and therefore the propelling-flights are arranged upon corresponding sides of the compartments,so that-thematerialmaybe quickly fed directly from each compartment to the discharge-opening, whereby it is not necessary to provide an opening through the partition a other than the opening I) to permit of the discharge of the material from the closed compartment to the discharge-opening C of the box. The collecting-box is provided at its discharge end with a partition 11 to present a discharge-mouth 12, formed by the cornor of the side and an end, this mouth 12 to register with a similar mouth 13 in the bolting-sieve, down through which mouths the tailings, &c., escape, as usual, the opening in the bolting-sieve adjacent to the mouth 13 being covered bya plate let, preferably of metal, upon which the entering flour is deposited. The cleat 15 may be positioned as shown in Figs. 2 and 3 or be otherwise disposed with relation to the cleats 10.

The upper edge of the frame of the collecting-box and of the directing-board is provided with transverse recesses 16 and in one end of the frame and of the board with a recess 17, the recesses 16 to be engaged by the cleats 6 and the recess 17 by the cleat 7. When the parts are assembled as shown in Fig. 3,

. the coaction between the two sets of cleats will operate in a certain and positive manner to prevent lateral and longitudinal play of the sieve and collecting-box frames with relation to each other irrespective of the number of these frames that may be so assembled.

It is to be understood that the sieve and collecting-box will be placed in the sieve-box and bolted down in the usual manner and that gyratory motion is imparted to the sievebox in the usual or any preferred way.

In order to steady and brace the conveying and directing board 2 and also to hold it in place when the cloth is to be changed, I pass a bar 18 through the sides of the sieve-frame and through the said board adjacent to its unattached end and slightly below its top edge, as shown in Figs. 1 and 3, the bar to be at such distance above the flights as not to interfere with their operation.

From the foregoing description it will be seen that the flour has a continuous and unbroken surface of sieve-cloth to traverse from its point of entry to its point of discharge, so that under the operation of the machine the locust-seed, Wheat, or other grain that may be em ployed for keeping thesieve-cloth clean will be prevented in a positive mannerfrom assembling in zones and swirling therein, which would result were the cleats arranged on the top of the sieve-cloth. It has been found in practice that when the cleats are disposed in the manner described the flour isbolted more evenly and rapidly and that both the sieve cloth and the frame will last longer, thereby effecting a great saving in the operation of the machine employing sifting-sieves such as described. Moreover,-the cleats upon the bottom of each frame form edge projec-' tions to enter the edge notches of the nextbelow frame, and thereby interlock the adjacent frames against separation both longitudinally and laterally. I

When the sieve-cloth is worn out, it will be only necessary to replace this with a new one, to remove the cleats 6 and 7, withdraw the tacks holding the sieve-cloth in place,

attach the new cloth in position, and then resecure the cleats in position. v

Having thus described the invention, what I claim is 1. Abolting device for gyratory bolting-machines, comprising superposed frame members having bottoms provided with corresponding tailings-discharge openings, thebottom of the upper member being formed by a screen, and the contiguous edges of the frames being provided with a notch and projection interlocking connection to prevent edgewise separation of the frames.

2. Aboltingdeviceforgyratorybolting-machiues,comprisin g superposed frames, having bottoms which are provided with corresponding tailings-discharge openings, the bottom of the upper frame member being formed by a screen, the upper edge of the lower frame member being provided with notches, and the bottom edge of the upper member being provided with projections corresponding to and adapted to fit snugly within the notches of the lower frame to prevent edgewise separation of the frame members.

3. As a new article of manufacture a bolting element for gyratory bolting-machines, comprising a skeleton frame having its upper edges provided with sets of alined notches, a bottom secured to the lower edge of the frame and having a discharge-opening formed therein at one end thereof, and bottom-supporting cleats secured to the lower edges of the frame across the outer side of the bottom and disposed to correspond with the respective sets of notches in the upper edges of a similarlyconstructed adjacent frame.

4. The combination with a bolting-sieve,

the cloth of which presents an unobstructed and arranged transversely and longitudinally thereof, of a collecting-box having recesses formedin its upper edges, with which recesses the said bars or cleats on the bolting-sieve detachably engage when the sieve and the box are assembled, thereby to prevent lateral and longitudinal play of the frames when in operation.

5. The combination with a bolting-sieve having sieve-cloth-supportin g bars secured to the under side of the frame, of a collectingboX having its upper edges provided with recesses with which the bars of the bolting-sieve detachably engage when the sieve and the box are assembled, the coaction between the bars and the recesses serving to effect a stable juncture between the two parts, and at the same time to prevent lateral or longitudinal play of the frames when in operation.

6. A bolting device for gyratory boltingthe presence of two Witnesses.

DANIEL IRA COGGIN. Witnesses:

CHAs. L. BENNETT, JOHN HENRY.

my own I have hereto affixed my signature in 3; 

